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Q: What composite numbers have GCF of 1?

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The GCF of all the composite numbers under 100 is 1. For e.g 4 & 9 are composite numbers & their GCF is 1, so if we take other composite numbers along with 4 & 9 the GCF will be 1.

4 and 9 have a GCF of 1

3 and 7?

Any two coprime numbers

Any two composite numbers who do not share the same prime factors.15 = 5x322 = 11x2So 15 and 22 have a GCF of 1

25 and 36

4 and 9 hope it helps!! : )

No.

25, 49 and 121

52 is composite. You need at least two numbers to find a GCF.

They are all composite numbers whose GCF is 1

If the GCF of two composite numbers is 1, they are co-prime or relatively prime.

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